Why does git reset --hard throw an error?

Question

git

Any ideas why not roll back? I screwed something up here :)

$ git reset --hard 434414fb48c82427deddc70e210aeb8bb0269eff
error: unable to create file Language Skills/Python/Unit 03 Conditionals and Control Flow/02 PygLatin/PygLatin PART2/11-Testing is this thing on?.py (Invalid argument)
error: unable to create file Language Skills/Python/Unit 04 Functions/01 Functions/Introduction to Functions/1-What good are functions?.py (Invalid argument)
error: unable to create file Language Skills/Python/Unit 06 Student Becomes the Teacher/01 Good Morning Class!/2-Whats the score?.py (Invalid argument)
error: unable to create file Language Skills/Python/Unit 06 Student Becomes the Teacher/02 Just Average/9-How is everything doing?.py (Invalid argument)
fatal: cannot create directory at 'Language Skills/Python/Unit 07 Lists and Functions/02 Battleship!/Hit or Miss?': Invalid argument